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Net Income Per Share | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share | NET INCOME (LOSS) PER COMMON SHARE Basic net income (loss) per common share is calculated by dividing income (loss) allocable to common stockholders by the weighted average number of shares of common stock outstanding during the period. In calculating diluted net income (loss) per common share, the number of shares is increased by the weighted average number of potential shares related to stock compensation awards. No dilutive effect is recognized in a period in which a net loss has occurred.
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Net loss allocable to common stockholders (in millions) | $ | (24.4 | ) |  | $ | (2.9 | ) |  | $ | (17.8 | ) |  | $ | (17.5 | )
Shares in thousands: |  |  |  |  |  |  |
Average common shares outstanding - basic | 9,077 |  |  | 9,080 |  |  | 9,070 |  |  | 9,071 |
Potentially dilutive shares related to stock options (a) | — |  |  | — |  |  | — |  |  | — |
Average common shares outstanding - diluted | 9,077 |  |  | 9,080 |  |  | 9,070 |  |  | 9,071 |
Net loss per common share – basic and diluted | (2.69 | ) |  | $ | (0.32 | ) |  | $ | (1.96 | ) |  | $ | (1.92 | )
(a) Common stock equivalents excluded from the diluted calculation as a result of a net loss in the period (in thousands) | 56 |  |  | 14 |  |  | 84 |  |  | 7 |
Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands) | 30 |  |  | 375 |  |  | 30 |  |  | 490 |

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